=== インド・ヨーロッパ祖語 ===
ヴェーダのルドラは、アポローンと似たような働きをする。
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The [[Vedic]] [[Rudra]] has some similar functions with Apollo. The terrible god is called "the archer" and the bow is also an attribute of [[Shiva]].<ref>For {{IAST|Śarva}} as a name of Shiva see: Apte, p. 910.</ref> Rudra could bring diseases with his arrows, but he was able to free people of them and his alternative Shiva is a healer physician god.<ref>For association between Rudra and disease, with Rigvedic references, see: Bhandarkar, p. 146.</ref> However the [[Indo-European language|Indo-European]] component of Apollo does not explain his strong relation with omens, exorcisms, and with the oracular cult.